My BX has a 23hp diesel, and a 12 inch bucket on the backhoe. The limitation is the weight. It weighs almost 2000 lbs with the loader and BH on it, and the backhoe simply picks the whole rig up when it hits something too big or dense. With a 14 hp engine, yours should do just as well, but at half speed. The limit will be the weight of the rig.
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